/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "spi.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "SEGGER_RTT.h"
#include "sfud.h"
#include "ff.h"

FATFS fs_flash;				/* FatFs文件系统对象 */
FIL fnew;					/* 文件对象 */
FRESULT res_flash;			/* 文件操作结果 */
UINT fnum;					/* 文件成功读写数量 */
BYTE ReadBuffer[128]={0};
BYTE WriteBuffer[] = "This is a test file for FatFs File System, hello,world.";

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

int fputc(int ch, FILE *f)
{
    SEGGER_RTT_PutChar(0, ch);
    return (ch);
}

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);

  /* System interrupt init*/
  NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);

  /* SysTick_IRQn interrupt configuration */
  NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),15, 0));

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_SPI1_Init();
  /* USER CODE BEGIN 2 */
	
	SEGGER_RTT_Init();
	sfud_init();

	printf("\r\n****** This is a SPI FLASH File system test! ******\r\n");
	res_flash = f_mount(&fs_flash,"1:",1);
	
	/*----------------------- 格式化测试 ---------------------------*/  
	/* 如果没有文件系统就格式化创建创建文件系统 */
	if(res_flash == FR_NO_FILESYSTEM)
	{
		BYTE work[FF_MAX_SS]; /* Work area (larger is better for processing time) */
		res_flash= f_mkfs("1:", 0, work, sizeof(work));
		
		if(res_flash == FR_OK)
		{
			printf("The file system was formatted successfully!\r\n");
			res_flash = f_mount(NULL,"1:",1);					
			res_flash = f_mount(&fs_flash,"1:",1);
		}
		else
		{
			printf("Failed to format the file system\r\n");
			while(1);
		}
	}
	else if(res_flash!=FR_OK)
	{
		printf("Failed to mount the file system!");
		while(1);
	}
	else
	{
		printf("The file system was mounted successfully\r\n");
		printf("A read-write test is possible\r\n");
	}

	/*----------------------- 文件系统测试：写测试 -----------------------------*/
	/* 打开文件，如果文件不存在则创建它 */
	printf("\r\n****** File write tests are coming soon... ******\r\n");	
	res_flash = f_open(&fnew, "1:FatFs_test.txt", FA_CREATE_ALWAYS | FA_WRITE );
	if ( res_flash == FR_OK )
	{
		printf("Open/create a FatFs_test.txt the file succeeds, and write data to the file.\r\n");
		res_flash = f_write(&fnew,WriteBuffer,sizeof(WriteBuffer),&fnum);
		if(res_flash == FR_OK)
		{
			printf("The file was written %d bytes successfully\r\n", fnum);
			printf("The data written to the file is:\r\n\r\n%s\r\n", WriteBuffer);
		}
		else
		{
			printf("！！File write failed(%d)\n",res_flash);
		}    
		
		f_close(&fnew);	// 不再读写，关闭文件
	}
	else
	{	
		printf("！！Failed to open/create file\r\n");
	}

	/*------------------- 文件系统测试：读测试 ------------------------------------*/
	printf("\r\n****** File read test coming soon... ******\r\n");
	res_flash = f_open(&fnew, "1:FatFs_test.txt", FA_OPEN_EXISTING | FA_READ); 	 
	if(res_flash == FR_OK)
	{
		printf("The file was opened successfully\r\n");
		res_flash = f_read(&fnew, ReadBuffer, sizeof(ReadBuffer), &fnum);
		if(res_flash==FR_OK)
		{
		  printf("The file was read %d bytes successfully\r\n", fnum);
		  printf("The data of the file obtained by reading is as follows:\r\n\r\n%s\r\n", ReadBuffer);
		}
		else
		{
		  printf("！！File read failed(%d)\n",res_flash);
		}		
	}
	else
	{
		printf("！！Failed to open the file.\r\n");
	}
	
	f_close(&fnew);					// 不再读写，关闭文件
	f_mount(NULL,"1:",1);		// 取消挂载文件系统

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		LL_mDelay(500);
		LL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
  while(LL_FLASH_GetLatency()!= LL_FLASH_LATENCY_3)
  {
  }
  LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE1);
  LL_RCC_HSE_Enable();

   /* Wait till HSE is ready */
  while(LL_RCC_HSE_IsReady() != 1)
  {

  }
  LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_25, 200, LL_RCC_PLLP_DIV_2);
  LL_RCC_PLL_Enable();

   /* Wait till PLL is ready */
  while(LL_RCC_PLL_IsReady() != 1)
  {

  }
  while (LL_PWR_IsActiveFlag_VOS() == 0)
  {
  }
  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
  LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);

   /* Wait till System clock is ready */
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
  {

  }
  LL_Init1msTick(100000000);
  LL_SetSystemCoreClock(100000000);
  LL_RCC_SetTIMPrescaler(LL_RCC_TIM_PRESCALER_TWICE);
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
